Characterization of active materials for lithium ion batteries using scanning probe techniques
- Abstract number
- 154
- DOI
- 10.22443/rms.mmc2021.154
- Corresponding Email
- [email protected]
- Session
- Stream 4 (AFM): SPM Techniques on Energy Materials and Processes
- Authors
- Prof. Dr. Andreas Bund (1), Dr. Svetlozar Ivanov (1), Sebastian Mai (1), Dr. Anna Dimitrova (2), Mario Kurniawan (1), Dr. Michael Stich (1)
- Affiliations
-
1. TU Ilmenau, Electrochemistry and Electroplating Group
2. TU Ilmenau, Group Technical Physics I
- Keywords
Batteries, Scanning probe technologies
- Abstract text
This contribution will discuss recent results from the authors' labs on active materials for lithium ion batteries and their characterization. Special focus will be given to the formation of the solid electrolyte interphase (SEI). The SEI is a thin layer of decomposition products from the electrolyte at the negative electrode (usually graphite) and forms during the first charging cycles.
The electrochemical and mechanical properties of the SEI are crucial for a safe and reliable function of the battery. Using in-situ electrochemical atomic force microscopy we studied the early stages of SEI formation at a carbon surface in a typical battery electrolyte.
The results show that this is a very dynamic process with several intermediate stages. The discussion of the scanning probe microscopy will be complemented by results from other powerful methods, such as in-situ microgravimetry and photo electron spectroscopy.